Plug-in Cards for Series 3700 Mainframes
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SWITCHING AND CONTROL
Plug-in cards for Series 3700 mainframes
Series 3700
A
G R E A T E R
M E A S U R E
O F
C O N F I D E N C E
Series 3700
Plug-in Cards for Series 3700 Mainframes
• Multiplexer, matrix, and
I/O cards
Specifications for Plug-In Cards
Plug-in cards for Series 3700 mainframes
• Relay closures automatically
counted and stored in each
card’s onboard memory
Additional Series 3700 cards are currently in development. For a current list of cards and specifications,
visit www.keithley.com.
• Unlimited contact life with
solid-state relay (Model 3724)
Page
• Automatic CJC for temperature
measurements when used
with screw terminal accessory
(Models 3720, 3721, 3724)
No. of Channels
Card Config.
Type of Relay
Ordering Information
Contact Configuration
3720 Dual 1×30 Multiplexer Card4
Max. Voltage
3721 Dual 1×20 Multiplexer Card6
3722 Dual 1×48, High Density,
Multiplexer Card . . . . . . . . 8
Max. Current Switched
Comments
3723 Dual 1×30, High
Speed, Reed Relay,
Multiplexer Card . . . . . . . 10
3724 Dual 1×30 FET
Multiplexer Card . . . . . . . 12
3720
3721
3722
4
6
8
60 (Dual 1×30)
40 (dual 1×20)
96 (dual 1×48)
Multiplexer
Latching
electromechanical
2 Form A
Multiplexer
Latching
electromechanical
2 Form A
300 V (ch 1–40),
300 V
60 V (ch 41–42)
2 A (ch 1–40),
1A
3 A (ch 41–42)
2 independent 1×20
2 independent 1×30
multiplexers. Automatic multiplexers. Automatic
temperature reference temperature reference
when used with screw when used with screw
terminal accessory
terminal accessory
(Model 3721-ST)
(Model 3720-ST)
Multiplexer
Latching
electromechanical
2 Form A
300 V
1A
2 independent 1×48
multiplexers
3730 6×16, High Density,
Matrix Card . . . . . . . . . . . . 15
3731 6×16, High Speed, Reed
Relay, Matrix Card . . . . . . 17
3732 Quad 4×28, Ultra-High
Density, Reed Relay,
Matrix Card . . . . . . . . . . . . 19
3740 General Purpose Card
with 32 Independent
Channels . . . . . . . . . . . . . . 23
Plug-in Card Accessories
3750 Multifunction Control Card25
SWITCHING AND CONTROL
Cables
2
Screw Terminal Block
Connector Kits
3721
3722
3720-MTC-1.5,
3720-MTC-3
3721-MTC-1.5,
3721-MTC-3
3722-MTC-1.5,
3722-MTC-1.5/MM,
3722-MTC-3,
3722-MTC-3/MM
3720-ST
3721-ST
3791-KIT78-R
3790-KIT50-R
3791-CIT
Tools
1.888.KEITHLEY (U.S. only)
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3720
A
G R E A T E R
M E A S U R E
3792-KIT104-R,
3792-KIT104-R/F
3791-CIT
O F
C O N F I D E N C E
3723
3724
3730
3731
3732
3740
3750
10
12
15
17
19
23
60 (dual 1×30) or
120 single pole
(dual 1×60)
60 (dual 1×30)
6×16
6×16
448 crosspoints
(Quad 4×28)
32
Multiplexer
Multiplexer
Matrix
Matrix
Dry reed
FET solid-state
Dry reed
Dry reed
1 Form A
2 Form A
Matrix
Latching
electromechanical
2 Form A
25
40 digital I/O, 4
counter/totalizers,
and 2 isolated analog
outputs
Independent
2 Form A
1 Form A
200 V
200 V
300 V
200 V
200 V
1A
0.1 A
1A
1A
0.75 A
2 independent 1×30
multiplexers
2 independent
1×30 multiplexers.
Automatic
temperature
reference when used
with screw terminal
accessory (Model
3724-ST)
Columns can be
expanded through
the backplane or
isolated by relays
3723
3724
3730
3731
3732
3740
3750
3720-MTC-1.5,
3720-MTC-3
3720-MTC-1.5,
3720-MTC-3
3721-MTC-1.5,
3721-MTC-3
3721-MTC-1.5,
3721-MTC-3
3720-MTC-1.5,
3720-MTC-3
3721-MTC-1.5,
3721-MTC-3
3721-MTC-1.5,
3721-MTC-3
3723-ST, 3723-ST-1
3724-ST
3730-ST
3731-ST
3732-ST-C, 3732-ST-R
3740-ST
3750-ST
3791-KIT78-R
3791-KIT78-R
3790-KIT50-R
3790-KIT50-R
3791-KIT78-R
3790-KIT50-R
3790-KIT50-R
3791-CIT
3791-CIT
1.888.KEITHLEY (U.S. only)
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Banks can be
Relay actuation time
connected
of 0.5ms. Columns
together via bank
can be expanded
configuration relays
through the
backplane or isolated to create a single
4×112 or dual 4×56
by relays
matrix. Analog
backplane relays also
included for card
to card expansion.
Row expansion with
3732-ST-R accessory
to create a dual 8×28
or single 16×28
matrix.
Independent
Latching
electromechanical
28 Form C, 4 Form A
300 VDC/250 VAC
(Form A)
2 A (Form C), 7 A
(Form A)
32 general purpose
independent
channels.
3791-CIT
A
G R E A T E R
M E A S U R E
O F
N/A
N/A
N/A
N/A
All-in-one card
design. 40
bidirectional
I/O. Four 32-bit
counter/totalizers.
2 programmable
analog (V or I)
outputs.
Plug-in cards for Series 3700 mainframes
Plug-in Cards for Series 3700 Mainframes
SWITCHING AND CONTROL
Series 3700
C O N F I D E N C E
3
3720
Dual 1×30 Multiplexer Card
60 differential channels, automatic CJC w/3720-ST accessory
• 60 two-pole channels or 30
four-pole channels for general
purpose switching
• Automatic CJC for temperature
measurements when used with
3720-ST accessory
Dual 1×30 multiplexer card
• Analog backplane connection
relays provide easy bank and
card interconnections
• 300V, 1A switched or 2A carry
signal capacity; 60W, 125VA
• Screw terminal connections
provided with removable
3720-ST accessory
• Relay closures stored in
onboard memory
• Latching electromechanical
relays
The Model 3720 offers two independent banks of 1×30 two-pole multiplexers. It is ideal for general
purpose switching, including temperature measurements. The two banks can automatically be
connected to the Series 3700 mainframe backplane and optional DMM through the analog backplane
connection relays. This connection allows the mainframe to reconfigure the card to a single 1×60
two-pole multiplexer or to enable card-to-card expansion for even larger configurations.
Other features of the Model 3720 include its ability to be reconfigured to coordinated four-pole
operation for additional measurement flexibility. Furthermore, the Model 3720 supports thermo
couple-type temperature measurements when used with the Model 3720-ST (screw terminal)
accessory providing automatic cold junction compensation (CJC).
The Model 3720 uses two 78-pin male D-sub connectors for signal connections. For screw terminal
or automatic CJC, use the detachable Model 3720-ST accessory.
Accessories Available
Ordering Information
3720
Dual 1×30
Multiplexer Card
3720-MTC-1.5
3720-MTC-3
3720-ST
3791-CIT
3791-KIT78-R
SWITCHING AND CONTROL
7401
4
1.888.KEITHLEY (U.S. only)
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78 Pin D-sub Female to Male Cable, 1.5m (5 ft.)
78 Pin D-sub Female to Male Cable, 3m (10 ft.)
Screw Terminal Block (required for auto CJC
thermocouple measurements)
Contact Insertion and Extraction Tool
78 Pin Female D-sub Connector Kit (contains
2 female D-sub connectors and 156 solder-cup
contacts)
Type K Thermocouple Wire (100 ft.)
A
G R E A T E R
Services Available
3720-3Y-EW-STD 1-year factory warranty extended to 3 years
from date of shipment
3720-5Y-EW-STD 1-year factory warranty extended to 5 years
from date of shipment
C/3720-3Y-STD 3 (Z540-1 compliant) calibrations within 3 years
of purchase*
*Not available in all countries
M E A S U R E
O F
C O N F I D E N C E
3720
Dual 1×30 Multiplexer Card
60 differential channels, automatic CJC w/3720-ST accessory
HI
LO
HI Analog
Backplane 1
LO (DMM Input)
HI Analog
Backplane 2
LO (DMM Sense)
Channel 1
HI
LO
HI Analog
LO Backplane 3
Channels 2–29
Channel 30
HI Analog
LO Backplane 5
HI
LO
HI Analog
LO Backplane 6
Multiplexer Bank 2
Output 2
Channel 31
HI
LO
HI Analog
Backplane 1
LO (DMM Input)
HI Analog
Backplane 2
LO (DMM Sense)
HI
LO
HI Analog
LO Backplane 3
Maximum Carrying Current for Pulses
Maximum Carrying Current (A)
20
100% duty
50% duty
25% duty
10% duty
5% duty
1 shot
1
0.1
1
10
100
Pulse Width (ms)
1000